/// @file
/// @author David Pilger <dpilger26@gmail.com>
/// [GitHub Repository](https://github.com/dpilger26/NumCpp)
///
/// License
/// Copyright 2020 David Pilger
///
/// Permission is hereby granted, free of charge, to any person obtaining a copy of this
/// software and associated documentation files(the "Software"), to deal in the Software
/// without restriction, including without limitation the rights to use, copy, modify,
/// merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
/// permit persons to whom the Software is furnished to do so, subject to the following
/// conditions :
///
/// The above copyright notice and this permission notice shall be included in all copies
/// or substantial portions of the Software.
///
/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
/// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
/// PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
/// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
/// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
/// DEALINGS IN THE SOFTWARE.
///
/// Description
/// Functions for working with NdArrays
///
#pragma once

#include "NumCpp/Core/Internal/StlAlgorithms.hpp"
#include "NumCpp/Core/Shape.hpp"
#include "NumCpp/Core/Types.hpp"
#include "NumCpp/Functions/column_stack.hpp"
#include "NumCpp/Functions/row_stack.hpp"

#include <initializer_list>

namespace nc
{
    //============================================================================
    // Method Description:
    ///						Join a sequence of arrays along an existing axis.
    ///
    ///                     NumPy Reference: https://www.numpy.org/devdocs/reference/generated/numpy.concatenate.html
    ///
    /// @param				inArrayList
    /// @param				inAxis (Optional, default NONE)
    /// @return
    ///				NdArray
    ///
    template<typename dtype>
    NdArray<dtype> concatenate(const std::initializer_list<NdArray<dtype> >& inArrayList, Axis inAxis = Axis::NONE)
    {
        switch (inAxis)
        {
            case Axis::NONE:
            {
                uint32 finalSize = 0;
                for (auto& ndarray : inArrayList)
                {
                    finalSize += ndarray.size();
                }

                NdArray<dtype> returnArray(1, finalSize);
                uint32 offset = 0;
                for (auto& ndarray : inArrayList)
                {
                    stl_algorithms::copy(ndarray.cbegin(), ndarray.cend(), returnArray.begin() + offset);
                    offset += ndarray.size();
                }

                return returnArray;
            }
            case Axis::ROW:
            {
                return row_stack(inArrayList);
            }
            case Axis::COL:
            {
                return column_stack(inArrayList);
            }
            default:
            {
                THROW_INVALID_ARGUMENT_ERROR("Unimplemented axis type.");
                return {}; // get rid of compiler warning
            }
        }
    }
} // namespace nc
